Normal photocards are fine being stored in a binder, but it’s not the most optimal for polaroids and valuable cards. Polaroids are usually of high value between 50-1000USD, it really depends on the group of course. If you want to make sure it doesn’t get damaged or destroyed you have to protect it properly.
The standard: One-touch case
One-touch cases are hard, sturdy and will keep your polaroid/card safe from the elements. It’s easy to use. Just open it up, place your polaroid/card (Preferably with a sleeve) and close it with the magnet. The most popular one is the Ultra-Pro One-Touch, but you can also get one from other brands like Ultimate Guard and BCW.
What does 35pt, 55pt, 75pt, 100pt stand for?
Pt stands for point and it is for the thickness of the card. 1,000 points = 1 inch = 25,4 mm. It doesn’t really matter for kpop collectors since you are most likely going to use the 35pt ones anyways. 35pt fits perfectly for normal photocards/polaroids and it is what I use to protect my polaroids.
The polaroids are usually smaller than sports cards so I use a sleeve for the polaroids so it doesn’t move around in the One-touch.
The Cheapest: Toploader with sleeve
This is the least optimal way to store valuable polaroids/cards and should only be considered when you don’t have anything else. When you buy a polaroid it should come in a toploader with a sleeve, so if you don’t have a One-touch case yet just let the polaroid be in the toploader if you don’t have another toploader.